Redman, Here is my story on the AirJet. Here is my good experience with the AirJet Chaffer. I installed it in a 1660 on Nov. 2nd 2002 due to a late Fall harvest here in Minnesota. This year the corn cobs are softer for some unknown reason and the cobs were breaking up and it was difficult to get a clean sample. The dealer's partsman told me that a lot of farmers were having this problem. If you closed the sieves too much, you would put corn on the ground, so many were slowing down to 3 MPH to keep the corn in the machine. Upon installation we went to the same field that I was harvesting the day before with a regular sieve. I have the "High Capacity Corn Elements" , since we are talking about yields of 170-200 Bushels_acre. I am totally sold on this type of cleaning system. It gave me back my 4+ MPH ground speed again with a much cleaner sample. A week later ( Nov 8 and 9th) I harvested soybeans with it. This sample was in one word "PERFECT" you could put those beans straight in your Air planter. I have to thank Mr. Gorden for his help with learning this system. I have learned that I can increase the fan speed to 1270 RPM, from the cab you now hear the fan. Would I do it again.....sure would. Good system. JWK